A sample of 30 freshmen biology students are randomly selected (Huitema, 1980, p.38) to analyze the difference among three type of behavioral objectives, which consist of (1) General, (2) Specific, and (3) Specific with study time allocations. The sample sizes of the three groups are equal with the common value 10. The response ($Y$) is the biology achievement test scores.

  Y       Trt
 10.0      1
 10.0      1
 11.0      1
 10.0      1
 11.0      1
 11.0      1
 10.0      1
 11.0      1
 11.5      1
 12.0      1
 12.0      2
 11.0      2
 11.0      2
 12.5     2
 12.0     2
  5.0     2
  6.0     2
  6.0     2
  7.0     2
  8.0     2
  9.0     3
  9.0     3
  9.0     3
 10.5     3
 11.0     3
 12.5     3
 12.5     3
 14.0     3
 14.5     3
 16.0     3